bab-bows



`A. S. BARROWS.

SHEET METAL CAR DUOR.

APPLICATION FILED AuG.1o,1917.

\ @M/9mm,

A. S. BARROWS.

SHEET METAL CAR DOOR.

APPLICATION FILED Aue.1o.1911.

Patented Sept. 9, 1919. 2 SHtETS-SHEET 2- lto ALLAN S. BAROIWS, 0F CHICAGG), ILLINUIS.

SHEET-METAL CAE-DOOR.

Specification of Letters Patent.

Fatented Sept.. 2, 1919..

Application led August 10, 1917. Serial No. 185,411.

To all fwkom it may concern.'

Be 1t known that l, ALLAN S. BARROWS, a citizen of the United States, residing at Chicago, in the county yof Cook and State' of Illinois, have invented a certain new and useful llmprovement inl Sheet-Metal Car- Doors, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements 'in sheet metal car doors.

One object of my invention is to provide an all-metal door more particularly adapted for use -on railway box cars and having great strength to resistlateral thrusts in proportion to the Weight of metal employed.

Another more specific object `of my invention is to provide a d-oor of the character above indicated which is adapted to be made from a' single sheet of metal and have the edges and body portion thereof strengthened entirely by integral formations.

The invention furthermore consists in the improvements in the parts and devices and in the novel combination of the artsand devices herein shown, described an claimed. ln the drawing forming part of this specification, Figure 1 is a sideelevationof a car door showing my improvements. Fig. 2 is a horizontal, sectional view upon a somewhat larger scale, of the structure illustrated in Fig. 1, and taken on the line 24-2 thereof. Fig. 3 is an enlarged. vertical, sectional view taken substantially on the line 3-3 of Fig. 1, and showing the upper rail structure. Figs. 4 and 5 are enlarged detail sectional views illustrating modifie-af.

tions adapting the door to car construction when it is desirable to form a spark and rain seal. And Fig. 6 represents another embodiment of the invention.

lin Fig. 2, parts are broken laway to prevent crowding of the drawing.

ln the construction illustrated` in Figs.

1, 2 and 3, the door B is of .the usual outside type. As shown, the door B is made of a single sheet of metal and all of the edges thereof are d-oubledback upon itself, as 1ndicated at 115-115 on the sides, 116 across the to and 117 across thebottom. At the right and end, as viewed inFigs. 1 and 2 that is, the rear end of the door, the doubled portion of the door edge is shown as bent at right angles to the main portion of the door, as indicated at 50, to thereby form a stop for engagement with a suitable post or flange on the side ofv the car. ln'this construction, the door B is provided around all four edges with an outwardly extended rib or corrugation 151 and the central portion of the door is dished inwardly within the area defined by the ribs or corrugations 151'. Said 4central dished portion is also provided .with outwardly extended ribs or corrugations 120 and 121 preferably extending horizontally. The ribs 120 terminate within the ribs 151 Whereasl the ribs 121 are preferably merged therewith at the ends. As most clearly shown in Fig. 2, the doubledover portions 15 and 115 are preferably extended over the ribs 151-151 and spot welded, as indicated at 215-215. This not only adds strength to the door'but serves the additional function of preventing any of the load from lodging within the vertical ribs 151-151 which might prevent opening of the door. As shown in Fig. 3, the doubled-over portions 116' and 117 are 'preferably extended over the adjacent horizontal ribs `151---151 and spot welded, as indicated at 216-2l, for the purpose of providing additional strength, particularly in back of the hanger brackets, hereinafterdescribed. With this construction, it is obvious that the edges of the door are thoroughly reinforced without unduly thickening the door and at the same time great strength is proyidcd to resist torsional effect eral blows.

Referring to Fig. 3, the method of hangon the door or latv ing the door is more clearly illustrated. As

ma well known form and l have adapted my sheet metal-door so .as to permit the use of such brackets without modification thereof and, where necessary, permit the remployment of old brackets. On its rear edge, the door may be provided with short pieces of angle iron, as indicated at 58, to bet-ter protect the door when it is moved to fully open .position and where it strikes against the be stated thatthe brackets n53 are of a v usual door stops: The door can be held in f closed position by anv suitable means, such plish this result are indicated. In Fig. 4 is shown a horizontal section of the rear edge of the door, said edge being 'inclined inwardly and toward the forward edge of the door, as indicated at 150 and adapted to engage under a correspondingly formed flange 152, the latter forming either a part of the side door post or being secured thereto. In Fig. 5 is represented the bottom edge of the door, the doubled-over portion 217 being bent at right angles to the ma-in portion of the door and adapted to lie under a floor plate or threshold plate and thus form a seal, as above indicated. A

In the construction illustrated in Fig. 6, the strength of the 'door against lateral thrusts is obtained by dishing the d oor inwardly with a rectangular panel, as indicated at 60, and within the latter is formed a substantially circular outwardly extending dished portion 61. Centrally of the latter, the door is again dished inwardly with a circular portion, as indicated at 62, the latter being 'made in the form of a very shallow cone. The edges of the door are formed in the same manner as in the other strucf tures and need noi'l be specifically described. With my invention, the door is made comaratively light yet exceedingly strong; bracing beams such as Z-bars and the li e are not required; all riveting may be substantially eliminated if spot welding is employed as described; and the door conforms to present standard railway practice and can be interchanged with old doors or applied to new equipment.

I claim:

1.` As an article of manufacture, a rectangular door adapted to slide horizontally, said door being composed of sheet metal and provided with edge corrugations therein 1ocated relatively close to the edges, said corrugations paralleling respective adjacent edges, the sheet metal being provided also with additional strengthening indentations within the boundaries of said edge corrugations, said door being formed with relatively narrow, plain marginal portions outside of said edge corrugations, said mar -nal portions being formed of multiple t icknesses of sheet metal lying against each other and rigidlyunited, all sald corrugations and indentations being disposed on one side of the plane defined by said marginal portions, said corrugations and indentations serving to strengthen the door against lateral, vertical, and torsional strains, one ply of each of said marginal portions being extended over the corresponding adjacent edge corrugation and rigidly secured to the mam portion of the door within the boundary of the edge corrugations.

2. As an article of manufacture, a door, said door being composed of sheet metal and provided with outwardly extending, hollow edge corrugations disposed adjacent to and paralleling the vertical edges of the door, the door being provided also with additional outwardly extending integral strengthening depressions within the boundaries of the edge corrugations, said door ,having relatively narrow marginal portions disposed outside of said edge corrugations, said marginal portions being composed of a multiple of plies of sheet metal, the innermost ply of metal, 'along each vertical edge on the inner side of the door, being extended over and beyond the corresponding adjacent vertical edge corrugation and rigidly united to the main portions of the door within the boundary of the corresponding edge corrugations to thereby brace and cover the latter and prevent articles located on the inner side of the door from lodging in said vertical corrugations when the door is in closed position.

3. As an article of manufacture, a door of substantially rectangular form and adapted for use as a box car door, said door being composed of sheet metal and provided with edge corrugations therein located relatively close to each edge and paralleling the latter, the sheet metal of 'said door being provided also with additional corrugations between the vertical edge corrugations, the door being formed with relatively narrow marginal portions outside of said edge corrugations, said marginal portions being composed of a multiple of plies of sheet; metal, one of said plies of metal along each edge of the door being extended over the corresponding adjacent edge corrugation and rigidly secured to the body of the door within the boundary of the edge corrugations to thereby cover the latter and brace the corrugation, the multiple-ply marginal portion along one vertical edge of the` door being extended at an angle to the door to thereby form a stop.

In witness that I claim the foregoing I have hereunto subscribed my name this 24th day of July, 1917.

ALLAN S. BARROWS. 

